Buggy code:
public final class Workbench extends EventManager implements IWorkbench { private final class StartupProgressBundleListener implements SynchronousBundleListener { private final IProgressMonitor progressMonitor ; private final int maximumProgressCount ; private final List starting ; StartupProgressBundleListener ( IProgressMonitor progressMonitor , int maximumProgressCount ) { } public void bundleChanged ( BundleEvent event ) { } } public static final String EARLY_STARTUP_FAMILY = "earlyStartup" ; private static final String [ ] VERSION_STRING = new String [ ] { "0.046" , "2.0" } ; private static final String DEFAULT_WORKBENCH_STATE_FILENAME = "workbench.xml" ; private static Workbench instance ; private static WorkbenchTestable testableObject ; private Display display ; private WindowManager windowManager ; private WorkbenchWindow activatedWindow ; private EditorHistory editorHistory ; private boolean runEventLoop = true ; private boolean isStarting = true ; private boolean isClosing = false ; private int returnCode = PlatformUI . RETURN_UNSTARTABLE ; private WorkbenchAdvisor advisor ; private WorkbenchConfigurer workbenchConfigurer ; private ExtensionEventHandler extensionEventHandler ; private int largeUpdates = 0 ; private final ServiceLocator serviceLocator = new ServiceLocator ( ) ; private int progressCount = - 1 ; private WorkbenchWindow [ ] createdWindows ; private Workbench ( Display display , WorkbenchAdvisor advisor ) { } public static final Workbench getInstance ( ) { } public static final int createAndRunWorkbench ( Display display , WorkbenchAdvisor advisor ) { } public static Display createDisplay ( ) { } public static WorkbenchTestable getWorkbenchTestable ( ) { } public void addWindowListener ( IWindowListener l ) { } public void removeWindowListener ( IWindowListener l ) { } protected void fireWindowOpened ( final IWorkbenchWindow window ) { } protected void fireWindowClosed ( final IWorkbenchWindow window ) { } protected void fireWindowActivated ( final IWorkbenchWindow window ) { } protected void fireWindowDeactivated ( final IWorkbenchWindow window ) { } private boolean busyClose ( final boolean force ) { } public boolean saveAllEditors ( boolean confirm ) { } private IWorkbenchWindow busyOpenWorkbenchWindow ( String perspID , IAdaptable input ) throws WorkbenchException { } public boolean close ( ) { } boolean close ( int returnCode , final boolean force ) { } public IWorkbenchWindow getActiveWorkbenchWindow ( ) { } protected EditorHistory getEditorHistory ( ) { } public IEditorRegistry getEditorRegistry ( ) { } private int getNewWindowNumber ( ) { } public IWorkbenchOperationSupport getOperationSupport ( ) { } public IPerspectiveRegistry getPerspectiveRegistry ( ) { } public PreferenceManager getPreferenceManager ( ) { } public IPreferenceStore getPreferenceStore ( ) { } public ISharedImages getSharedImages ( ) { } WindowManager getWindowManager ( ) { } private File getWorkbenchStateFile ( ) { } public int getWorkbenchWindowCount ( ) { } public IWorkbenchWindow [ ] getWorkbenchWindows ( ) { } public IWorkingSetManager getWorkingSetManager ( ) { } public ILocalWorkingSetManager createLocalWorkingSetManager ( ) { } private boolean init ( Display display ) { } private void initializeCommandResolver ( ) { } private void initializeApplicationColors ( ) { } private void initializeSingleClickOption ( ) { } private void initializeFonts ( ) { } private static void initializeImages ( ) { } private void uninitializeImages ( ) { } private void initializeColors ( ) { } public boolean isClosing ( ) { } private final void initializeDefaultServices ( ) { Command . DEBUG_COMMAND_EXECUTION = Policy . DEBUG_COMMANDS ; commandManager = new CommandManager ( ) ; final CommandService commandService = new CommandService ( commandManager ) ; commandService . readRegistry ( ) ; serviceLocator . registerService ( ICommandService . class , commandService ) ; ContextManager . DEBUG = Policy . DEBUG_CONTEXTS ; contextManager = new ContextManager ( ) ; final IContextService contextService = new ContextService ( contextManager ) ; contextService . readRegistry ( ) ; serviceLocator . registerService ( IContextService . class , contextService ) ; <START_BUG> final IHandlerService handlerService = new HandlerService ( commandManager ) ; <END_BUG> handlerService . readRegistry ( ) ; serviceLocator . registerService ( IHandlerService . class , handlerService ) ; BindingManager . DEBUG = Policy . DEBUG_KEY_BINDINGS ; bindingManager = new BindingManager ( contextManager , commandManager ) ; final IBindingService bindingService = new org . eclipse . ui . internal . keys . BindingService ( bindingManager , commandService , this ) ; bindingService . readRegistryAndPreferences ( commandService ) ; serviceLocator . registerService ( IBindingService . class , bindingService ) ; final CommandImageManager commandImageManager = new CommandImageManager ( ) ; final CommandImageService commandImageService = new CommandImageService ( commandImageManager , commandService ) ; commandImageService . readRegistry ( ) ; serviceLocator . registerService ( ICommandImageService . class , commandImageService ) ; final SMenuManager menuManager = new SMenuManager ( ) ; final IMenuService menuService = new org . eclipse . ui . internal . menus . WorkbenchMenuService ( menuManager , commandService ) ; menuService . readRegistry ( ) ; serviceLocator . registerService ( IMenuService . class , menuService ) ; final ISourceProviderService sourceProviderService = new SourceProviderService ( ) ; serviceLocator . registerService ( ISourceProviderService . class , sourceProviderService ) ; final ActiveShellSourceProvider activeShellSourceProvider = new ActiveShellSourceProvider ( this ) ; handlerService . addSourceProvider ( activeShellSourceProvider ) ; contextService . addSourceProvider ( activeShellSourceProvider ) ; menuService . addSourceProvider ( activeShellSourceProvider ) ; sourceProviderService . registerProvider ( activeShellSourceProvider ) ; final ActivePartSourceProvider activePartSourceProvider = new ActivePartSourceProvider ( this ) ; handlerService . addSourceProvider ( activePartSourceProvider ) ; contextService . addSourceProvider ( activePartSourceProvider ) ; menuService . addSourceProvider ( activePartSourceProvider ) ; sourceProviderService . registerProvider ( activePartSourceProvider ) ; final ActiveContextSourceProvider activeContextSourceProvider = new ActiveContextSourceProvider ( contextService ) ; handlerService . addSourceProvider ( activeContextSourceProvider ) ; menuService . addSourceProvider ( activeContextSourceProvider ) ; sourceProviderService . registerProvider ( activeContextSourceProvider ) ; final CurrentSelectionSourceProvider currentSelectionSourceProvider = new CurrentSelectionSourceProvider ( this ) ; handlerService . addSourceProvider ( currentSelectionSourceProvider ) ; contextService . addSourceProvider ( currentSelectionSourceProvider ) ; menuService . addSourceProvider ( currentSelectionSourceProvider ) ; sourceProviderService . registerProvider ( currentSelectionSourceProvider ) ; actionSetSourceProvider = new ActionSetSourceProvider ( ) ; handlerService . addSourceProvider ( actionSetSourceProvider ) ; contextService . addSourceProvider ( actionSetSourceProvider ) ; menuService . addSourceProvider ( actionSetSourceProvider ) ; sourceProviderService . registerProvider ( actionSetSourceProvider ) ; menuSourceProvider = new MenuSourceProvider ( ) ; handlerService . addSourceProvider ( menuSourceProvider ) ; contextService . addSourceProvider ( menuSourceProvider ) ;

Fix:
final IHandlerService handlerService = new org . eclipse . ui . internal . handlers . HandlerService ( commandService ) ;